As the world population increases, energy demands are growing and the need to recover harder to access sources of energy, as well as to increase the use of nuclear and renewable energy sources, is becoming more apparent. Until renewable sources are able to meet demands, we need to focus on improving the use of nuclear, natural gas, and coal energy supplies. The increased use of nuclear energy requires both the development of further safety measures to prevent nuclear power plant accidents in addition to a disposal solution for the produced nuclear waste. Hydrofracking to increase natural gas production has amplified in recent years but has met significant public opposition in addition to raising concerns over, and producing evidence of, groundwater contamination. Coal has been, and remains, a prominent source of world energy requiring Carbon Capture and Storage (CCS) or other means of controlling and reducing carbon emissions to mitigate climate change resulting from greenhouse gases. My work focuses on advancing our understanding the water- rock interactions crucial to the continued use and future success of these energy generation technologies while concurrently advancing understanding of fundamental geochemistry, contaminant transport, and water resources by incorporating novel imaging, experimental and modeling approaches.